hi im using verizon cdma iphone 4s on gsm network with gevey multi network sim,everything works except voice mail i can recive notification but when i press voice mail button i have busy tone thats because under settings and phone somehow i got installed vodaphone vf nl services??? i dont know how thats is possible and my phone every time i want to hear voice mail dialing phone number in netherlands and looks like this,so i need to dial aditional simple mobile carrier number in order to hear voice mail any help please? any can tell how to change to tmobile voicemail. thank

I have the same issue, does anyone know where these setting are in the iphone files so I can SSH and edit them?

---------- EDIT ----------

After I posted I was really fed up with this issue so I decided to analyze the Raw File System on mi Iphone and I found these numbers (the ones with the international code that show in the phone settings all the way at the bottom) so I changed them for my phone number and that was it!!!! the voice mail shortcut is fully functional. you have to edit several folders in different locations with a keyword string of code though..... but it is worth it.

you have to have a jailbroken iphone, I will post later how I did it but if in a hurry just email....